[dm-devel] [RFC PATCH 1/3] block: add copy offload support

[Bart Van Assche]

On 2/3/22 10:50, Mikulas Patocka wrote:
> On Tue, 1 Feb 2022, Bart Van Assche wrote:
>> On 2/1/22 10:32, Mikulas Patocka wrote:
>>>    /**
>>> + * blk_queue_max_copy_sectors - set maximum copy offload sectors for the
>>> queue
>>> + * @q:  the request queue for the device
>>> + * @size:  the maximum copy offload sectors
>>> + */
>>> +void blk_queue_max_copy_sectors(struct request_queue *q, unsigned int size)
>>> +{
>>> +	q->limits.max_copy_sectors = size;
>>> +}
>>> +EXPORT_SYMBOL_GPL(blk_queue_max_copy_sectors);
>>
>> Please either change the unit of 'size' into bytes or change its type into
>> sector_t.
> 
> blk_queue_chunk_sectors, blk_queue_max_discard_sectors,
> blk_queue_max_write_same_sectors, blk_queue_max_write_zeroes_sectors,
> blk_queue_max_zone_append_sectors also have the unit of sectors and the
> argument is "unsigned int". Should blk_queue_max_copy_sectors be
> different?

As far as I know using the type sector_t for variables that represent a 
number of sectors is a widely followed convention:

$ git grep -w sector_t | wc -l
2575

I would appreciate it if that convention would be used consistently, 
even if that means modifying existing code.

Thanks,

Bart.